Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Physics Letters B Année : 2016

Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment

G. Aad (1) , Z. Barnovska (2) , N. Berger (2) , M. Delmastro (2) , L. Di Ciaccio (2) , S. Elles (2) , K. Grevtsov (2) , T. Guillemin (2) , T. Hryn’ova (2) , S. Jézéquel (2) , I. Koletsou (2) , R. Lafaye (2) , Jérémy Lévêque (2) , P. Mastrandea (2) , G. Sauvage (2) , E. Sauvan (2) , O. Simard (2) , B.H. Smart (2) , T. Todorov (2) , I. Wingerter-Seez (2) , E. Yatsenko (2) , D. Boumediene (3) , E. Busato (3) , D. Calvet (3) , S. Calvet (3) , A.R. Chomont (3) , J. Donini (3) , Ph. Gris (3) , R. Madar (3) , D. Pallin (3) , S.M. Romano Saez (3) , C. Santoni (3) , D. Simon (3) , F. Vazeille (3) , S. Albrand (4) , S. Berlendis (4) , C. Camincher (4) , J. Collot (4) , S. Crépé-Renaudin (4) , P.A. Delsart (4) , C. Gabaldon (4) , M.H. Genest (4) , P.O.J. Gradin (4) , J.Y. Hostachy (4) , F. Ledroit-Guillon (4) , A. Lleres (4) , A. Lucotte (4) , F. Malek (4) , E. Petit (4) , J. Stark (4) , B. Trocmé (4) , M. Wu (4) , M.K. Ayoub (5) , A. Bassalat (5) , S. Binet (5) , C. Becot , C. Bourdarios (5) , J.B. de Vivie de Regie (5) , D. Delgove (5) , L. Duflot (5) , M. Escalier (5) , L. Fayard (5) , D. Fournier (5) , E.L. Gkougkousis (5) , J.-F. Grivaz (5) , F. Hariri (5) , S. Henrot-Versille (5) , J. Hrivnac (5) , L. Iconomidou-Fayard (5) , M. Kado (5) , A. Lounis (5) , N. Makovec (5) , N. Morange (5) , C. Nellist (5) , P. Petroff (5) , L. Poggioli (5) , P. Puzo (5) , A. Renaud (5) , G. Rybkin (5) , D. Rousseau (5) , A.C. Schaffer (5) , L. Serin (5) , E. Scifo (5) , S. Simion (5) , R. Tanaka (5) , D. Zerwas (5) , Zhongkai Zhang (5) , Y. Zhao (5) , G. Rahal (6) , M. Alstaty (1) , M. Barbero (1) , A. Calandri (1) , T.P. Calvet (1) , Y. Coadou (1) , C. Diaconu (1) , Sara Diglio (1) , F. Djama (1) , V. Ellajosyula (1) , L. Feligioni (1) , J. Gao (1) , A. Hadef (1) , G.D. Hallewell (1) , F. Hubaut (1) , S.J. Kahn (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , J. Liu (1) , K. Liu , D. Madaffari (1) , E. Monnier (1) , S. Muanza (1) , E. Nagy (1) , P. Pralavorio (1) , Y. Rodina (1) , A. Rozanov (1) , M. Talby (1) , T. Theveneaux-Pelzer (1) , R.E. Ticse Torres (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , L. Vacavant (1) , Chen Wang (1)
G. Aad
N. Berger
T. Hryn’ova
C. Becot
  • Fonction : Auteur
D. Rousseau
D. Zerwas
  • Fonction : Auteur
  • PersonId : 842996
Y. Coadou
K. Liu
  • Fonction : Auteur
E. Monnier
Chen Wang
  • Fonction : Auteur
  • PersonId : 829307

Résumé

Measurements of the per-event charged-particle yield as a function of the charged-particle transverse momentum and rapidity are performed using $p+$Pb collision data collected by the ATLAS experiment at the LHC at a centre-of-mass energy of $\sqrt{s_{NN}}=5.02$ TeV. Charged particles are reconstructed over pseudorapidity $|\eta|<2.3$ and transverse momentum between $0.1$ GeV and $22$ GeV in a dataset corresponding to an integrated luminosity of $1$ $\mu b^{-1}$. The results are presented in the form of charged-particle nuclear modification factors, where the $p+$Pb charged-particle multiplicities are compared between central and peripheral $p+$Pb collisions as well as to charged-particle cross sections measured in pp collisions. The $p+$Pb collision centrality is characterized by the total transverse energy measured in $-4.9<\eta<-3.1$, which is in the direction of the outgoing lead beam. Three different estimations of the number of nucleons participating in the $p+$Pb collision are carried out using the Glauber model and two Glauber-Gribov colour-fluctuation extensions to the Glauber model. The values of the nuclear modification factors are found to vary significantly as a function of rapidity and transverse momentum. A broad peak is observed for all centralities and rapidities in the nuclear modification factors for charged-particle transverse momentum values around $3$ GeV. The magnitude of the peak increases for more central collisions as well as rapidity ranges closer to the direction of the outgoing lead nucleus.

Dates et versions

in2p3-01319815 , version 1 (23-05-2016)

Identifiants

Citer

G. Aad, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment. Physics Letters B, 2016, 763, pp.313-336. ⟨10.1016/j.physletb.2016.10.053⟩. ⟨in2p3-01319815⟩
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